package us.codecraft.webmagic.samples;
   
   import us.codecraft.webmagic.Page;
   import us.codecraft.webmagic.Site;
   import us.codecraft.webmagic.Spider;
   import us.codecraft.webmagic.processor.PageProcessor;
   import us.codecraft.webmagic.samples.pipeline.OneFilePipeline;
   import us.codecraft.webmagic.scheduler.FileCacheQueueScheduler;
   import us.codecraft.webmagic.selector.Selectable;
  
  import java.io.FileNotFoundException;
  import java.io.UnsupportedEncodingException;
  import java.util.List;
  
  /**
   * @author code4crafer@gmail.com
   */
  public class MamacnPageProcessor implements PageProcessor {
  
      private Site site = Site.me().setDomain("www.mama.cn").setSleepTime(100);
  
      @Override
      public void process(Page page) {
          List<Selectable> nodes = page.getHtml().xpath("//ul[@id=ma-thumb-list]/li").nodes();
          StringBuilder accum = new StringBuilder();
          for (Selectable node : nodes) {
              accum.append("img:").append(node.xpath("//a/@href").get()).append("\n");
              accum.append("title:").append(node.xpath("//img/@alt").get()).append("\n");
          }
          page.putField("",accum.toString());
          if (accum.length() == 0) {
              page.setSkip(true);
          }
          page.addTargetRequests(page.getHtml().links().regex("http://www\\.mama\\.cn/photo/.*\\.html").all());
      }
  
      @Override
      public Site getSite() {
          return site;
      }
  
      public static void main(String[] args) throws FileNotFoundException, UnsupportedEncodingException {
          Spider.create(new MamacnPageProcessor())
                  .setScheduler(new FileCacheQueueScheduler("/data/webmagic/mamacn"))
                  .addUrl("http://www.mama.cn/photo/t1-p1.html")
                  .addPipeline(new OneFilePipeline("/data/webmagic/mamacn/data"))
                  .thread(5)
                  .run();
      }
  }